Combined wire and wireless telegraph system.



M. B. JOHNSON. COMBINED WIRE AND WIRELESS TELEGRAPH SYSTEM. APPLICATION FILED 00'1'. 6,191 I HWHHIP- Zhwentors Patented June 27, 1911.

MAUBlI-QE BERNAYS JOHNSON, OF SAN- ANTONIO, TEX-AS.

COMBINED WIRE AND WIRELESS TELEGRAlPlHi SYSTEM.

Specification of Letters Patent.

Patented game 27, 1911.

- Application flied October 6, 1910. Serial No. 585,543.

To all whom fit'mdy' concern! Be it known that I, MAURICE BE AYS J oHNsoN, a citizen of the United States, and

a resident of San Antonia-in the county of i Bexar and State of Texas, have made and invented certain new and useful l'improvements in Combined Wireand Wireless'I-ele- 3 graph Systems, of which the-following is a specification.

My invention. relates to combined'wir'e and wireless telegraph systems, and the object thereof is to provide a telegraph system I in which an ordinary wire transmission line is used for a part of the distance to be trav} ersed, after which the message is transferred to and sent through space as in wireless systems, .the wireless transmission mechanism belng under the control of the operator at the end of the wireless circuit remote therefrom. There .will preferably be a wire, transmission line leading from each end of the wireless transmission system, so that an operator maytransmit a message through'a wire sys-' tem for any distance, transfer to a wireless system, and then continue communication through a second wire circuit, the wireless system in such case being a connecting link between two wire circuits, the nearer ends of which may not readily be connected" by wires. Y

With the above objects inview, my invention consists in'the'combined 'wire and wireless telegraph systemillustrated in the ac companyingd'rawing, described in the-following specification, and particularly claimed in the clauses of the concluding claim, and

in=such modifications thereof as will be obvione to one skilled in the'art to which-my invention relates.

In the drawing, the view shows in diagram the"preferred form of my invention.

The upper a wire circuit of "any length to as the sending station, while the'lower portion of 'theview shows the receiving wireless station and the wire circuit leading 'therefrom to any remote place, it' being understood that thejmes'sage is transmitted through space between the two'wireless sta- -:tions, and that there are no operators at either wireless station, the operator at the remote end ofthe upper wire. ClIOlllt' communicating directly with the operator at the remote end of the lower wire circuit through i the wireless system.

1, 2 are the ends of. a wire circuit, the

other end of which may be any distance .-away. i

3 is'a telegraph relay adapted to co'ntrol'a Shormally open circuit 4: which includes a battery or other source of electricity, 5 and f-the primary of an induction coil 6, the secondary of which induction coil discharges through a spark gap 7 thus establishing an foscillatory flow through the circuit 8, coil 9, and condenser 10, and resulting in electrical waves being sent out from the aerial wires '13 isa circuit connected in shunt with the circuit 4 and which circuit includes. a relay 14, whic relay, when energized, establishes electrical communication between the aerial wire 11 and the sending portion of the wireless system of which it forms a part, communication between "the coil 9 and aerial wire 11 being normally interrupted at 15.

16 is a circuit connected in series with the llne wires 1, 2 and relay 3'and which'is nor-' -mally closed so thatcurrent may flow through the line wires l', 2', relay 3 and cir- -cuit 16, but which circuit may be opened .when' amessage is to be sent-to the operal end the circuit 16 includes a suitable circuit breaking device shownas in the form of a relay 17 so arranged that the-circuit WlllCh tor at the far end of the line 1, 2, to which I it control's,-that is the circuit 16, is nor- L mally' closed.

.The mechanism, thus far described enables Q an operator at'the far end of the wire line 1, .2 to send outtelectrical waves from the aerial ortion' of the view shows the a i the distant wireless receiving station and transmitted over a wire line to a more .dis-

11; and the-message thus sent is received at tant receiving operator by'mechanism as follows: 18 is the aerial at the receiving sta- 't ion, the same being normally in electrical connection with the receiving elements of the second wireless station. 19'is a coherer included in a circuit '20 which establishes communication between the aerial 18 and the ground. 21 is acircuit in shunt with the coherer 19 and which circuit includes a battery 22 and a relay 23 which controls a normallyopen circuit 24 having a de-coherer 25 and batteries 26 therein, and which circuit 24 also includes a relay 27 controlling a normally open circuit 28, through which current may flow from the line wires 30, 31 when such circuit is closed. v

In order that the current flowing in the circuit 28 shall flow through the line 30, 31 and not through the relay 32, which corresponds with the relay 3 in construction and function, a relay 33 corresponding with the relay 17 and so arranged that the circuit 34, corresponding with the circuit 16, which it controls is normally closed, is connected in series in the circuit 28 which relay, upon being energized, breaks the circuit 34 and prevents current from the line wires 30, 31 and the line batteries from flowing in shunt through the relay 32, which, if permitted,

would obviously result in that signals re-' ceived by the aerial 18 would be sent out again over the same aerial as well vas over the line 30, 31, thus interfering with the receiving function of the station.

In sending from the distantend of the line 1, 2 current flows through the relay 3 and circuit .16, the circuit 4 being made as the relay 3'is energized, whereby electrical waves are sent out from the aerial 11 byreason a the relay 27 and closing the circuit 28, thus" of the induction coil 6, spark gap 7, -andcondenser 10, it being remembered that the aerial ll'is connected with the sending elementsof the wireless station by means of the relay 14 in the shunt circuit 13. The waves thus generated pass to the aerial 18, and the relay 23 is energized by the battery 22, a flow being established by reason of the coherer 19 in the manner common in such devices. The relay 23 closes'the circuit 24, thus energizing sending. a message over the line3Q, 31 to a distant operator, the relay 32 being cut out by means of the relay 33 acting to break the circuit 34 as above explained, it being understood that the current for' sending over the line 30, 31 is derived from the batteries of other source of electricity commonly provided for such wire transmission systems.

I have described the operation of my system when used to transmita message from the remote end of the line 1, 2 through the Wireless stations to the remote end' of the line 30, 31. It will be understood, however, that a message maybe sent in -a reverse direction, each wireless station being equipped with both sending and receiving apparatus,

and, Without specifically tracing a message from the remote end of the line 30, 31 to the remote end of the line 1, 2, it may, be remembered that the relay 32 controls a circuit 35 corresponding in function with the circuit 4', and that 36 is a battery in such. circuit which includes also the primary of an in- (luction coil 37, 38 is a spark gap, 39. is a circuit including the secondary of the induction coil 37, 40 is a coil in such circuit,

and 41 a condenser, these elements being like in function to. the corresponding elements 6, 7, 8, 9, 10 above referred. to.

42 is a circuit corresponding withthe circuit 13, and 43 is-a relay included therein for placing the aerial 18 in condition to send electrical impulses, the connection between the sending elements of the station and the aerial 18 being normally broken at 44.

45 is an adjustable or sliding contact between the coil 40 and the aerialfor adjusting the frequency of vibration of the impulses sent out therefrom. Impulses sent from the aerial 18 are received by-the aerial 11, as above explained for transmission in a reverse direction, 46 being a circuit including a coherer 47, 48 a circuit controlled by said coherer, 49 a battery and 50 a relay both included in said circuit.

51 is a circuit cont-rolled by the relay 50 and which includes aide-coherer 52, bat-- teries 53 and a relay 54, these elements being like in function and construction the ele- -ments 20, 19 and 21 to 27 above referred to.

The relay 54 controls a circuit 55 like the circuit 28, and the relay 17 above referred to and the function of which is the same as the relay 33 as above explained is connected in series in the circuit 55.

The receiving instruments of each wireless station are inclosed by a screen formed preferably from woven wire, a portion of which is shown at 57, which screed is connected struments; and means controlled from said distant sending instruments for operating said circuit breaking device.

2. In a system-of the type described, a relay;a circuit breaking device adapted to interrupt the flow of current throughthe magnet coil thereof and including an electromagnet the armature of which controls a normally closed circuit in series with the magnet coilof said relay; wireless sending instruments controlled by said relay other -w1reless sending instruments located at a distance from said first mentioned sending instruments; a second relay controlled from said distant sending instruments; and a circuit controlled by said second relay and which circuit includes the magnet of said circuit breaking device and through which current may flow to. operate said circuit breaking device.

3. In a system of the type described, wireless sending instruments; wireless receiving instruments; other wireless sending instruments located ata distance from said first mentioned sendin and receiving instruments; and means controlled from said dis-- tant sending instruments for rendering said first mentioned sending instruments inoperative to send a message.

4. In a system of the type described, wire less sending instruments including a circuit breaking device; wireless receiving instruments; other wireless sending instruments located at a distance from said first mentioned sending and receiving instruments; and means controlled from said distant sending instruments for operating said circuit breaking device.

5.;In a system of the type described, a relay; a circuit breaking device adapted to interrupt the flow of current through the magnet coil thereof and including an edectromagnet the armature of which controls a normally closed circuit in series with the magnet coil of said relay; wireless sending instruments controlled by said relay; wireless receiving instruments including a second relay; other wireless sending instruments located at a distance from said first I mentioned sending and recelving instrumen ts; and a circuit controlled by said second relay and which circuit includes the magnet of said circuit breaking device and through which current may flow to operate said circuit breaking device.

6. In a system ofthe type described, a relay; a normally open circuit controlled by said relay; wireless sending instruments controlled by said relay, the same including an aerial normally disconnected from said sending instruments; a second relay con trolled by said first mentioned relay and adapted to connect said aerial with said sending instruments; and wireless receiving instruments with which said aerial is normally connected. 4

7. In a system of the type described, two wireless stations located at a distance from one another and each having wireless sending and receivin instruments; and means at each station w ereby the sending instruments thereof may be rendered inoperative from the other station. n

Signed. at New York, borough of Manhattan, in the county of New York and State of New York, this 30th day of September, A... D. 1910.

MAURICE BEENAYS JOHNSON.

Witnesses:

A. V. WALSH, H. M; WHITE. 

